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| Autori principali: | , , , |
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| Natura: | Preprint |
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2025
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2505.10531 |
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| _version_ | 1866915708283125760 |
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| author | Hosseinabadi, Hossein Tserkovnyak, Yaroslav Demler, Eugene Marino, Jamir |
| author_facet | Hosseinabadi, Hossein Tserkovnyak, Yaroslav Demler, Eugene Marino, Jamir |
| contents | We uncover a new class of dynamical quantum instability in driven magnets leading to emergent enhancement of antiferromagnetic correlations even for purely ferromagnetic microscopic couplings. A primary parametric amplification creates a frequency-tuned nested magnon distribution in momentum space, which seeds a secondary instability marked by the emergence of enhanced antiferromagnetic correlations, mirroring the instability of nested Fermi surfaces in electronic systems. In sharp contrast to the fermionic case, however, the magnon-driven instability is intrinsically non-equilibrium and fundamentally inaccessible in thermal physics. Its quantum mechanical origin sets it apart from classical instabilities such as Faraday and modulation instabilities, which underlie several instances of dynamical behavior observed in magnetic and cold-atom systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_10531 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnon Nesting in Driven Two-Dimensional Quantum Magnets Hosseinabadi, Hossein Tserkovnyak, Yaroslav Demler, Eugene Marino, Jamir Materials Science Quantum Gases Pattern Formation and Solitons Quantum Physics We uncover a new class of dynamical quantum instability in driven magnets leading to emergent enhancement of antiferromagnetic correlations even for purely ferromagnetic microscopic couplings. A primary parametric amplification creates a frequency-tuned nested magnon distribution in momentum space, which seeds a secondary instability marked by the emergence of enhanced antiferromagnetic correlations, mirroring the instability of nested Fermi surfaces in electronic systems. In sharp contrast to the fermionic case, however, the magnon-driven instability is intrinsically non-equilibrium and fundamentally inaccessible in thermal physics. Its quantum mechanical origin sets it apart from classical instabilities such as Faraday and modulation instabilities, which underlie several instances of dynamical behavior observed in magnetic and cold-atom systems. |
| title | Magnon Nesting in Driven Two-Dimensional Quantum Magnets |
| topic | Materials Science Quantum Gases Pattern Formation and Solitons Quantum Physics |
| url | https://arxiv.org/abs/2505.10531 |